Math, asked by divyabm2004, 3 months ago


Find dy/dx if y=(x²+3)cosxlogx​

Answers

Answered by Anonymous
0

Step-by-step explanation:

y = ( {x}^{2}  + 3)cos \: x \: log \: x \\  \\ diff.w.r.to.x \\  \\  \frac{dy}{dx}  = 2x.cos \: x \: .logx +  ({x}^{2}  + 3).( - sin \: x).log \: x + ( {x}^{2}  + 3).cos \: x. \frac{1}{x}  \\  \\  = 2xcos \: x \: log \: x - ( {x}^{2}  + 3).sin \: x.log \: x +  \frac{( {x}^{2}  + 3).cos \: x}{x}  \\  \\  \\ using \: formula \:  \:  \:  \:  \:  \:  \:  \frac{d}{dx} (u.v.w) = v.w. \frac{du}{dx}  + u.w. \frac{dv}{dx}  + u.v. \frac{dw}{dx}  \\  \\  \frac{d}{dx} (log \: x) =  \frac{1}{x}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  \frac{d}{dx} (cos \: x ) =  - sin \: x \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  \frac{d}{dx} ( {x}^{n} ) = n. {x}^{n - 1}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

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